One-part alkali activated slag using Ca(OH)2 and Na2CO3 instead of NaOH as activator: more excellent compressive strength and microstructure
In this paper, sodium carbonate and calcium hydroxide instead of sodium hydroxide used as composite activators, and slag are applied to prepare one-part alkali-activated slag. Furthermore, the properties of the slag activated by sodium hydroxide are compared. The compressive strength, XRD, TGA, MIP,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ac16f4 |
| _version_ | 1797746838803054592 |
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| author | Shiming Zhou Chunqin Tan Yuan Gao Yang Li Shenglai Guo |
| author_facet | Shiming Zhou Chunqin Tan Yuan Gao Yang Li Shenglai Guo |
| author_sort | Shiming Zhou |
| collection | DOAJ |
| description | In this paper, sodium carbonate and calcium hydroxide instead of sodium hydroxide used as composite activators, and slag are applied to prepare one-part alkali-activated slag. Furthermore, the properties of the slag activated by sodium hydroxide are compared. The compressive strength, XRD, TGA, MIP, and SEM analysis of the two systems are performed. The results show that the one-part alkali-activated slag prepared from sodium carbonate and calcium hydroxide has a superior compressive strength against the slag activated by sodium hydroxide. It is also found that the hydration speed of the sodium hydroxide activated slag is faster, and thus the higher compressive strength of the one-part alkali-activated slag is not caused by the hydration speed. The hydration of one-part alkali-activated slag produces a certain amount of calcium carbonate, resulting in a lower porosity in comparison with the slag activated by sodium hydroxide, which may be the reason for the better compressive strength of one-part alkali-activated slag. |
| first_indexed | 2024-03-12T15:43:31Z |
| format | Article |
| id | doaj.art-cd632947773f487494382d21e74c2988 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:43:31Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-cd632947773f487494382d21e74c29882023-08-09T15:53:17ZengIOP PublishingMaterials Research Express2053-15912021-01-018808550110.1088/2053-1591/ac16f4One-part alkali activated slag using Ca(OH)2 and Na2CO3 instead of NaOH as activator: more excellent compressive strength and microstructureShiming Zhou0Chunqin Tan1Yuan Gao2Yang Li3Shenglai Guo4https://orcid.org/0000-0002-5881-4942Sinopec Key Laboratory of Cementing and Completion, Beijing 100101, People’s Republic of ChinaSinopec Key Laboratory of Cementing and Completion, Beijing 100101, People’s Republic of ChinaSinopec Key Laboratory of Cementing and Completion, Beijing 100101, People’s Republic of ChinaKey Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)) , Ministry of Education, Qingdao 266580, People’s Republic of China; School of Petroleum Engineering, China University of Petroleum (East China) , Qingdao 266580, People’s Republic of ChinaKey Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)) , Ministry of Education, Qingdao 266580, People’s Republic of China; School of Petroleum Engineering, China University of Petroleum (East China) , Qingdao 266580, People’s Republic of ChinaIn this paper, sodium carbonate and calcium hydroxide instead of sodium hydroxide used as composite activators, and slag are applied to prepare one-part alkali-activated slag. Furthermore, the properties of the slag activated by sodium hydroxide are compared. The compressive strength, XRD, TGA, MIP, and SEM analysis of the two systems are performed. The results show that the one-part alkali-activated slag prepared from sodium carbonate and calcium hydroxide has a superior compressive strength against the slag activated by sodium hydroxide. It is also found that the hydration speed of the sodium hydroxide activated slag is faster, and thus the higher compressive strength of the one-part alkali-activated slag is not caused by the hydration speed. The hydration of one-part alkali-activated slag produces a certain amount of calcium carbonate, resulting in a lower porosity in comparison with the slag activated by sodium hydroxide, which may be the reason for the better compressive strength of one-part alkali-activated slag.https://doi.org/10.1088/2053-1591/ac16f4alkali activated slagcalcium hydroxidesodium carbonatecompressive strength |
| spellingShingle | Shiming Zhou Chunqin Tan Yuan Gao Yang Li Shenglai Guo One-part alkali activated slag using Ca(OH)2 and Na2CO3 instead of NaOH as activator: more excellent compressive strength and microstructure Materials Research Express alkali activated slag calcium hydroxide sodium carbonate compressive strength |
| title | One-part alkali activated slag using Ca(OH)2 and Na2CO3 instead of NaOH as activator: more excellent compressive strength and microstructure |
| title_full | One-part alkali activated slag using Ca(OH)2 and Na2CO3 instead of NaOH as activator: more excellent compressive strength and microstructure |
| title_fullStr | One-part alkali activated slag using Ca(OH)2 and Na2CO3 instead of NaOH as activator: more excellent compressive strength and microstructure |
| title_full_unstemmed | One-part alkali activated slag using Ca(OH)2 and Na2CO3 instead of NaOH as activator: more excellent compressive strength and microstructure |
| title_short | One-part alkali activated slag using Ca(OH)2 and Na2CO3 instead of NaOH as activator: more excellent compressive strength and microstructure |
| title_sort | one part alkali activated slag using ca oh 2 and na2co3 instead of naoh as activator more excellent compressive strength and microstructure |
| topic | alkali activated slag calcium hydroxide sodium carbonate compressive strength |
| url | https://doi.org/10.1088/2053-1591/ac16f4 |
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